GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2007 🢒 G3 🢒 Body Systems 🢒 Lighting 🢒 High Beams Inoperative

High Beams Inoperative Hatchback

Step

Action

Values

Yes

No

1

Test the high beam headlamps in the flash-to-pass mode.

Do the high beam headlamps work in the flash-to-pass mode?

--

Go to Step 2

Go to Step 3

2

Replace the headlamp combination switch.

Is the repair complete?

--

System OK

--

3

Test fuses EF25 and EF26.

Is fuse EF25 and EF26 open?

--

Go to Step 4

Go to Step 5

4
  1. Test for a short circuit. Repair the short circuit, if necessary.
  2. Replace the fuse.

Is the repair complete?

--

System OK

--

5
  1. Turn ON the high beam headlamps.
  2. Measure the voltage at fuse EF25 and EF26.

Does the voltage available at fuse EF25 and EF26 equal the value specified?

11-14 V

Go to Step 7

Go to Step 6

6

Temporarily substitute the illumination lamp relay in place of the headlamp high relay.

Do the headlamps operate with the substituted relay?

--

Go to Step 7

Go to Step 8

7

Reinstall the illumination lamp relay in its original position, and install a new headlamp relay.

Is the repair complete?

--

System OK

--

8
  1. Install the headlamp high relay.
  2. Measure the voltage at headlamp switch connector terminal 4.

Does the voltage equal the value specified?

11-14 V

Go to Step 10

Go to Step 9

9

Repair the open circuit between headlamp high relay terminal 86 and headlamp switch connector terminal 4.

Is the repair complete?

--

System OK

--

10
  1. Disconnect the headlamp connector.
  2. Turn the headlamp switch to the high-beam position.
  3. Use an ohmmeter to measure the continuity between terminals 6 and 4 of the headlamp switch.

Does the ohmmeter indicate continuity?

--

Go to Step 11

Go to Step 2

11
  1. Connect the headlamp switch connector.
  2. Turn the headlamp switch to the high-beam position.
  3. Measure the voltage at the light switch connector terminal 2.

Does the voltage equal the value specified?

11-14 V

Go to Step 13

Go to Step 12

12

Repair the open circuit between the headlamp switch connector terminal 6 and light switch connector terminal 2.

Is the repair complete?

--

System OK

--

13
  1. Disconnect the light switch connector.
  2. Turn the headlamp switch to the high-beam position.
  3. Use an ohmmeter to measure the continuity between terminals 2 and 3 of the light switch.

Does the ohmmeter indicate continuity?

--

Go to Step 14

Go to Step 2

14

Repair the open circuit between ground and the light switch connector terminal 3.

Is the repair complete?

--

System OK

--

15
  1. Turn ON the high beam headlamps.
  2. Measure the voltage at headlamp terminal 1 with the high beams selected.

Does the voltage available at the headlamp connector terminal 1 equal the value specified?

11-14 V

Go to Step 17

Go to Step 16

16

Repair the open circuit between fuse EF19 and the high beam headlamps.

Is the repair complete?

--

System OK

--

17
  1. Disconnect the headlamp connectors.
  2. Connect an ohmmeter between the ground and the headlamp connector terminal 3.

Does the ohmmeter indicate continuity?

--

Go to Step 19

Go to Step 18

18

Repair the open circuit between the ground and the headlamp connector terminal 3.

Is the repair complete?

--

System OK

--

19

Replace the faulty headlamps. Refer to Headlamp Replacement .

Is the repair complete?

--

System OK

--

High Beams Inoperative Notchback

Step

Action

Values

Yes

No

1

Check the high beam headlamps in the flash-to-pass mode.

Do the high beam headlamps work in the flash-to-pass mode?

--

Go to Step 2

Go to Step 3

2

Replace the headlamp combination switch.

Is the repair complete?

--

System OK

--

3

Temporarily substitute the illumination lamp relay in place of the headlamp high relay.

Do the headlamps operate with the substitute relay?

--

Go to Step 4

Go to Step 5

4

Reinstall the illumination lamp relay in its original position and install a new headlamp relay.

Is the repair complete?

--

System OK

--

5
  1. Install the headlamp high relay.
  2. Check the voltage at headlamp switch connector terminal 4.

Does the voltage equal the value specified?

11-14V

Go to Step 7

Go to Step 6

6

Repair the open circuit between headlamp high relay terminal 86 and headlamp switch connector terminal 4.

Is the repair complete?

--

System OK

--

7
  1. Disconnect the headlamp switch connector.
  2. Turn the headlamp switch to the high-beam position.
  3. Use an ohmmeter to check the continuity between terminals 6 and 4 of the headlamp switch.

Is the resistance within the specified value?

<1.0 ohms

Go to Step 8

Go to Step 2

8
  1. Connect the headlamp switch connector.
  2. Turn the headlamp switch to the high-beam position.
  3. Check the voltage at the light switch connector terminal 2.

Does the voltage equal the value specified?

11-14V

Go to Step 10

Go to Step 9

9

Repair the open circuit between the headlamp switch connector terminal 6 and light switch connector terminal 2.

Is the repair complete?

--

System OK

--

10
  1. Disconnect the light switch connector.
  2. Turn the headlamp switch to the high-beam position.
  3. Use an ohmmeter to check the continuity between terminals 2 and 3 of the light switch.

Is the resistance within the specified value?

<1.0 ohms

Go to Step 11

Go to Step 2

11

Repair the open circuit between ground and the light switch connector terminal 3.

Is the repair complete?

--

System OK

--

12
  1. Turn the high beam headlamps on.
  2. Check the voltage at headlamp terminal 1 with the high beams selected.

Doe the voltage available at the headlamp connector terminal 1 equal the value specified?

11-14V

Go to Step 14

Go to Step 13

13

Repair the open circuit between fuse Ef23 and the high beam headlamps.

Is the repair complete?

--

System OK

--

14
  1. Disconnect the headlamp connectors.
  2. Connect an ohmmeter between the ground and the headlamp connector terminal 3.

Is the resistance within the specified value?

<1.0 ohms

Go to Step 16

Go to Step 15

15

Repair the open circuit between the ground and the headlamp connector terminal 3.

Is the repair complete?

--

System OK

--

16

Replace the faulty headlamps.

Is the repair complete?

--

System OK

--